Embryonic stem cells (ESCs) were labeled with heavy isotopes, 13C615N4-arginine (Arg10) and 13C614N2-lysine (Lys6), or light isotopes, 12C614N4-arginine (Arg0) and 12C614N2-lysine (Lys0), respectively, for a total of 7 passages to ensure efficient labeling (>97%). The ESCs labeled with heavy isotope...
ORGANISM(S): Mus Musculus